A kinetic–equilibrium study of a triiodide concentration maximum formed by the persulfate–iodide reaction

Arthur E. Burgess, John C. Davidson

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The presence of triiodide, I3–, throughout the lifetime of a persulfate–iodide reaction with persulfate in excess, is controlled by an opposing effect of falling iodide concentration and rising iodine concentration. This brings triiodide to a concentration maximum, [I3–]max, which can be studied by UV–visible spectroscopy using absorbance measurements taken over an extended iodine clock time-scan. Equilibrium and conservation equations can be combined so that, together with [I3–]max, a value of the constant K for the equilibrium established between iodine, iodide, and the triiodide complex ion can be obtained.
Original languageEnglish
Pages (from-to)814–816
Number of pages3
JournalJournal of Chemical Education
Volume89
Issue number6
DOIs
Publication statusPublished - 2012
Externally publishedYes

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Iodine
Iodides
conservation
Clocks
Conservation
Spectroscopy
Ions
Values
time

Cite this

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abstract = "The presence of triiodide, I3–, throughout the lifetime of a persulfate–iodide reaction with persulfate in excess, is controlled by an opposing effect of falling iodide concentration and rising iodine concentration. This brings triiodide to a concentration maximum, [I3–]max, which can be studied by UV–visible spectroscopy using absorbance measurements taken over an extended iodine clock time-scan. Equilibrium and conservation equations can be combined so that, together with [I3–]max, a value of the constant K for the equilibrium established between iodine, iodide, and the triiodide complex ion can be obtained.",
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A kinetic–equilibrium study of a triiodide concentration maximum formed by the persulfate–iodide reaction. / Burgess, Arthur E.; Davidson, John C.

In: Journal of Chemical Education, Vol. 89, No. 6, 2012, p. 814–816.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A kinetic–equilibrium study of a triiodide concentration maximum formed by the persulfate–iodide reaction

AU - Burgess, Arthur E.

AU - Davidson, John C.

PY - 2012

Y1 - 2012

N2 - The presence of triiodide, I3–, throughout the lifetime of a persulfate–iodide reaction with persulfate in excess, is controlled by an opposing effect of falling iodide concentration and rising iodine concentration. This brings triiodide to a concentration maximum, [I3–]max, which can be studied by UV–visible spectroscopy using absorbance measurements taken over an extended iodine clock time-scan. Equilibrium and conservation equations can be combined so that, together with [I3–]max, a value of the constant K for the equilibrium established between iodine, iodide, and the triiodide complex ion can be obtained.

AB - The presence of triiodide, I3–, throughout the lifetime of a persulfate–iodide reaction with persulfate in excess, is controlled by an opposing effect of falling iodide concentration and rising iodine concentration. This brings triiodide to a concentration maximum, [I3–]max, which can be studied by UV–visible spectroscopy using absorbance measurements taken over an extended iodine clock time-scan. Equilibrium and conservation equations can be combined so that, together with [I3–]max, a value of the constant K for the equilibrium established between iodine, iodide, and the triiodide complex ion can be obtained.

U2 - 10.1021/ed200055t

DO - 10.1021/ed200055t

M3 - Article

VL - 89

SP - 814

EP - 816

JO - Journal of Chemical Education

JF - Journal of Chemical Education

SN - 0021-9584

IS - 6

ER -